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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.dockerapi.metrics;
import com.yahoo.metrics.simple.MetricReceiver;
import org.junit.Test;
import java.util.Map;
import static org.junit.Assert.assertEquals;
/**
* @author freva
*/
public class MetricReceiverWrapperTest {
private static final Dimensions hostDimension = new Dimensions.Builder().add("host", "abc.yahoo.com").build();
private static final String applicationDocker = MetricReceiverWrapper.APPLICATION_DOCKER;
@Test
public void testDefaultValue() {
MetricReceiverWrapper metricReceiver = new MetricReceiverWrapper(MetricReceiver.nullImplementation);
metricReceiver.declareCounter(applicationDocker, hostDimension, "some.name");
assertEquals(metricReceiver.getMetricsForDimension(applicationDocker, hostDimension).get("some.name"), 0L);
}
@Test
public void testSimpleIncrementMetric() {
MetricReceiverWrapper metricReceiver = new MetricReceiverWrapper(MetricReceiver.nullImplementation);
CounterWrapper counter = metricReceiver.declareCounter(applicationDocker, hostDimension, "a_counter.value");
counter.add(5);
counter.add(8);
Map<String, Number> latestMetrics = metricReceiver.getMetricsForDimension(applicationDocker, hostDimension);
assertEquals("Expected only 1 metric value to be set", 1, latestMetrics.size());
assertEquals(latestMetrics.get("a_counter.value"), 13L); // 5 + 8
}
@Test
public void testSimpleGauge() {
MetricReceiverWrapper metricReceiver = new MetricReceiverWrapper(MetricReceiver.nullImplementation);
GaugeWrapper gauge = metricReceiver.declareGauge(applicationDocker, hostDimension, "test.gauge");
gauge.sample(42);
gauge.sample(-342.23);
Map<String, Number> latestMetrics = metricReceiver.getMetricsForDimension(applicationDocker, hostDimension);
assertEquals("Expected only 1 metric value to be set", 1, latestMetrics.size());
assertEquals(latestMetrics.get("test.gauge"), -342.23);
}
@Test
public void testRedeclaringSameGauge() {
MetricReceiverWrapper metricReceiver = new MetricReceiverWrapper(MetricReceiver.nullImplementation);
GaugeWrapper gauge = metricReceiver.declareGauge(applicationDocker, hostDimension, "test.gauge");
gauge.sample(42);
// Same as hostDimension, but new instance.
Dimensions newDimension = new Dimensions.Builder().add("host", "abc.yahoo.com").build();
GaugeWrapper newGauge = metricReceiver.declareGauge(applicationDocker, newDimension, "test.gauge");
newGauge.sample(56);
assertEquals(metricReceiver.getMetricsForDimension(applicationDocker, hostDimension).get("test.gauge"), 56.);
}
@Test
public void testSameMetricNameButDifferentDimensions() {
MetricReceiverWrapper metricReceiver = new MetricReceiverWrapper(MetricReceiver.nullImplementation);
GaugeWrapper gauge = metricReceiver.declareGauge(applicationDocker, hostDimension, "test.gauge");
gauge.sample(42);
// Not the same as hostDimension.
Dimensions newDimension = new Dimensions.Builder().add("host", "abcd.yahoo.com").build();
GaugeWrapper newGauge = metricReceiver.declareGauge(applicationDocker, newDimension, "test.gauge");
newGauge.sample(56);
assertEquals(metricReceiver.getMetricsForDimension(applicationDocker, hostDimension).get("test.gauge"), 42.);
assertEquals(metricReceiver.getMetricsForDimension(applicationDocker, newDimension).get("test.gauge"), 56.);
}
@Test
public void testDeletingMetric() {
MetricReceiverWrapper metricReceiver = new MetricReceiverWrapper(MetricReceiver.nullImplementation);
metricReceiver.declareGauge(applicationDocker, hostDimension, "test.gauge");
Dimensions differentDimension = new Dimensions.Builder().add("host", "abcd.yahoo.com").build();
metricReceiver.declareGauge(applicationDocker, differentDimension, "test.gauge");
assertEquals(2, metricReceiver.getDefaultMetricsRaw().size());
metricReceiver.deleteMetricByDimension(applicationDocker, differentDimension, MetricReceiverWrapper.DimensionType.DEFAULT);
assertEquals(1, metricReceiver.getDefaultMetricsRaw().size());
assertEquals(metricReceiver.getMetricsForDimension(applicationDocker, hostDimension).size(), 1);
assertEquals(metricReceiver.getMetricsForDimension(applicationDocker, differentDimension).size(), 0);
}
}
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